Even Lady Gaga has limits — and putting her name on ice cream made from human breast milk appears to cross them.

The most outrageous pop star on the planet is suing a London ice-cream shop for trademark infringement after it began selling a flavor of ice cream called Baby Gaga made from human milk.

“She’s acting like a big baby who is crying over spilled breast milk,” said Matt O’Connor, owner of The Icecreamists.

“And this is coming from the woman who wears the flesh of rotting cows as an awards-show gown.”

Gaga has demanded that the ice cream parlor immediately change the name or stop selling it altogether, and her lawyers called the ice cream “deliberately provocative and, to many people, nausea-inducing.”

They also complain that the frosty treat is served by a waitress dressed to look like Lady Gaga.